Chair back



FIG. 1 is a perspective view of a chair back in accordance with a first embodiment of the present invention;

FIG. 2 is a front view of the chair back of FIG. 1;

FIG. 3 is a side view of the chair back of FIGS. 1 and 2;

FIG. 4 is an opposite side view of the chair back of FIGS. 1-3;

FIG. 5 is a back view of the chair back of FIGS. 1-4;

FIG. 6 is a top view of the chair back of FIGS. 1-5;

FIG. 7 is a bottom view of the chair back of FIGS. 1-6;

FIG. 8 is a perspective view of an alternative version of the chair back in accordance with the first embodiment of the present invention;

FIG. 9 is a front view of the chair back of FIG. 8;

FIG. 10 is a side view of the chair back of FIGS. 8 and 9;

FIG. 11 is an opposite side view of the chair back of FIGS. 8-10;

FIG. 12 is a back view of the chair back of FIGS. 8-11;

FIG. 13 is a top view of the chair back of FIGS. 8-12; and,

FIG. 14 is a bottom view of the chair back of FIGS. 8-13.

The broken lines shown in the Figures are for environmental purposes only and form no part of the claimed design. 

CLAIM The ornamental design for a chair back, as shown and described. 